. Appendix to the Journals of the Senate and Assembly of the ... session of the Legislature of the State of California . Female of Anopheles punctipennis, Exp. Station.) in far northern Alaskareport them as the se-verest plague of thatsection. Explorershave not yet penetratedsufficiently far to thenorth or south to es-cape the one dreads thispest. Their droningsound in the still hoursof the night alwaysbrings with it a feelingof irritation and dread,and the poisonouswounds inflicted by them are well known to everybody. It has nowbeen definitely proven that the bite
. Appendix to the Journals of the Senate and Assembly of the ... session of the Legislature of the State of California . Female of Anopheles punctipennis, Exp. Station.) in far northern Alaskareport them as the se-verest plague of thatsection. Explorershave not yet penetratedsufficiently far to thenorth or south to es-cape the one dreads thispest. Their droningsound in the still hoursof the night alwaysbrings with it a feelingof irritation and dread,and the poisonouswounds inflicted by them are well known to everybody. It has nowbeen definitely proven that the bite of the common mosquito, Culexirritans, with all itspain and irritation, isthe lesser evil inflictedby the members of thisfamily, for there is nowno doubt that they areactive agents in thespread of malaria andyellow fever, and per-haps of other malig-nant contagious dis-eases. To the non-ento-mologist a mosquito is. At left, head of male Culex; at right, heart of female(ulex, enlarged. (Miss. Agr. Exp. Station.) a mosquito, but to the entomologist there are numerous species includedunder this title, all of varying degrees of badness, ranging from bad to worse and worst, theplagued pipens, whichannoy us so, not beingamong the worst. Themalaria-spreadingmosquito is known asAnopheles maculipen-n is. while that to whichwe owe the dissemina-tion of yellow fevergoes by the name of PIG. 78. Atleft, head of Anopheles, showing appendages; at Stegomyia fasciata. Itright, head of nice, showing appendages. Enlarged. . (Miss. Agr. Exp. station.) would seem that the
Size: 2105px × 1188px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorcaliforn, bookcentury1800, bookdecade1850, bookyear1853
